Locking device for bulb supports of direction indicators



Oct. 2, 1928.

' A. R. P. JOHNSON LOCKING DEVICE FOR BULB SUPPORTS 0F DIRECTIONINDICATORS Filed March 19. 1928 v 25 part of a direction indicatingchamber.v o

Patented @ct. 2, 192%.

ALLAN ROLAND EYE JOHNSON, OF TORONTO, ONTARIO, CANADA.

LOCKING DEVICE FOR BULB SUPPORTS OF. DIRECTION INDICATORS.

Application filed March 19, 1928. Serial No. 262,787.

My invention relates to improvements in locking devices for bulbsupports of direc.

. tion indicators, and the object of the inven= 3 tion is to devisesimple means for releasably lockin the illuminatin bulb sun JOItS in t:z-v 1 place so that they may be readilyremoved Whenever des red, and itconsists essentially of the arrangement and construction of parts ashereinafter more particularly explained.

Fig. l is a sectional view through a portion of the back Wall and a Wallvertical thereto and the incandescent bulb and bulb support the bulbbeing shown in elevation and the support partially in section andpartially in elevation.

Fig. 2 is a sectional plan view on line 22 Figure 1. V y

In the drawing like characters'of reterence indicate corresponding partsin each figure. l

1 indicates a portion of a back Wall of a direction indicator casing. 2is a Wall er;- tending' at right angles thereto and forming D an orificeformed in the Wall 2. .t is a boss extending from the back Wall and from'the wall ,2 and provided adjacent the Wall .2 with a recess 5.

The recess 5 maybe made concentricto the centre of the orifice 3, butthis is not essential.

The incandescent bulb support is in the form of a sleeve 6 in which thebulb base 7 is secured by means of a pin or pins 7* extending intocorrespondingbayonet slots 6*,

8 is a spring contact pin of any suitable construction mounted Withinthe sleeve :6. 9 is an annular flange extending-around the'sleeve 6, aportion of which is cut ol'las indicated at 9 7 7 When it is desired toplace my bulb sup port in position all it is necessary to do is to passthe sleeve 6 through the orifice 3 so that the cut off portion 9* isopposite the boss 4%.. When the flange 9 is brought opposite the recess5 the support is turned into the position shown in Figure 2 so that theflange enters the recess 5 thereby securely locking; the bulb support inplace from Withdrawal. y 1 l /Vhatl claim as my invention is V Thecombination With two Wall portions set at right angles one to the other,one of said portions having anorifice therein, a recess formed in-tlieother wall portion adjacent the orifice a sleeve forming a support foran incandescent bulb and coacting contacts and fitting the'a'loresa'idorifice and provided with an annular flange having a cut offportion adapted when the sleeve is turned to permit the flange thereofclearing the recess to permit of the. Withdrawal of the sleeve. 7

' ALLAN ROLAND PYEjJOHNSON.

